Jake tests the durability of the bikini (and of Abbie)

Jake was standing now. Abbie leaned forward, and rested her hands on a table. Jake swung his hand again, palm to her ass, and landed with a loud smack. "Two," he said. Her ass was getting pink.

He pulled his arm back again, and spanked her three quick times in succession, each one more forceful than the previous. "Three. Four. Five." Abbie's ass was starting to turn red where he was hitting her.

Abbie felt a surge of pain followed by a wash of pleasure on each spanking. "Six." The sting of his palm striking her was momentarily excruciating, but sometimes he left his palm there, holding the skin, feeling the warmth. "Seven."

Jake pulled his own shorts down, and with his left hand, stroked his cock, which was beginning to stiffen. Abbie put her hands behind her and spread her ass cheeks. "Eight. Nine." Jake rubbed the tip of his dick on Abbie's pussy lips, but did not penetrate. He used her juices to lubricate himself, and then teased her asshole with his cock.

"Ten. And I was thinking the second phase of the durability test should get more intense. Don't you agree?"

"Mmm, I do," said Abbie.

While touching his cock to her asshole, pushing a little, but not yet penetrating her, he spanked her again. "Eleven. Twelve." She gyrated her hips, inviting him into her. He pushed the head of his cock into her asshole, and held there. "Thirteen. Fourteen." He pushed further in, an inch, then another. "Fifteen."

She felt him enter her, and she was not quite wet enough and not quite loose enough. He felt very tight to her. She spit into her hand and stroked the shaft of his dick. He pulled out, allowed her to jerk him a few times, which moistened him for her. Jake fingered Abbie's ass, stretching her hole a bit. He let go, stroked his dick a few times, and hit her again. "Sixteen."

Her ass felt like it was on fire now. All of the spankings had been on one side, and that one side was red and hot to the touch. Next time, half on each side, Jake, Abbie thought. And let's bring some ice.

He plunged back into her asshole, this time more comfortable for both of them. He fell into a steady, if shallow, rhythm of anally fucking her, with about half of his cock going in on each thrust. "Seventeen."

After a moment, Abbie's muscles relaxed, and it was easier for Jake to push further. Three quarters in, almost all the way ... "Eighteen." ... and then he slammed forward, her ass taking his full length. "Nineteen." He slammed into her ass again and again. Abbie used her hand to rub her clit, and occasionally slid her own fingers into her pussy in sync with Jake's cock in her ass.

They fucked for a while in this position, just taking time to enjoy their rhythm and pattern. Jake rubbed and caressed Abbie's bruised right ass cheek. Every time he touched her, she would take a deeper breath, readying herself for the twentieth.

Jake began to pump faster as he felt his climax coming. Abbie was wildly fingering herself, and wanted to come at the same time. Jake felt her energy, and understood the goal.

"Last phase of the test is coming in three ... two ... one ..." Jake hit her one more time. Abbie felt her skin radiate with heat. Jake's cock erupted in her asshole. Abbie's fingers worked furiously on her clit, and she felt her own climax shudder through her body.

"Twenty," she whispered. "Twenty." She spasmed again, and again. "Twenty." Her whispered got softer as her body got more relaxed. "Twenty."

Jake was panting as he pulled his cock from her ass. "Durability test passed."

Abbie smiled, also out of breath. "Glad it didn't have to be twenty-one." She rubbed her right ass cheek.

"Oh Abbie, things are a bit red back here."

"I can only imagine. I think I'm going to need to clean up a bit if we're still planning to hit the pool."